Effect of Anions and Cations on Tartrazine Removal by the Zero-Valent Iron/Peroxymonosulfate Process: Efficiency and Major Radicals

Zero-valent iron/peroxymonosulfate (Fe0/PMS) has been considered as a promising approach for wastewater treatment. Anions and cations are widely present in have significant effects on the performance of Fe0/PMS system Thus, study, tartrazine was selected target model; SO42−, NO3−, HCO3−, Cl− were representative anions Ca2+, Cu2+, Mg2+, Mn2+ chosen cations. The effect these removal major radicals systematically investigated. presence certain concentration SO42− had positive, NO3− negative, HCO3− negligible system. small contribution proportion reduction, SO4•− •OH; could enhance would decrease •OH. A each Mg2+ no •OH, while SO4•−. These results can provide some references to treat actual containing